Family = Asteraceae, Genus = Lactuca, Species = serriola, including synonyms,
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|Lactuca serriola (prickly lettuce)
(= Lactuca serriola in Flora of the Pacific Northwest)
Winter annual or biennial, 3-15 dm. tall, glabrous, with milky juice.
Distribution: Introduced and naturalized in most of the United States; common in the Pacific Nortwest.
Habitat: Fields and waste places.
Origin: Introduced from Europe
WA Native Plant Society